When the source is at the centre of the circle and the observer is moving on the circumference of circle, the sound heard by observer:
Correct answer: A. Same
- A. Same
- B. Different
- C. Increasing
- D. Decreasing
Explanation
Consider the circle,the source is at the centre of the circle and the observer is moving on the circumference of the circle.The observer is not moving towards the centre nor moving away but is moving on the circumference of the circle.The distance from centre to circumference is same at all points so the sound heard by observer is same.
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About Waves
Progressive waves transfer energy through oscillations, with wavelength, frequency, amplitude and wave speed related by v = fλ; sound speed depends on the medium. Superposition produces interference and stationary waves in strings and organ pipes, while simple harmonic motion describes the oscillation itself and must be distinguished from wave propagation.
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